Growth of double-wall carbon nanotubes with diameter-controlled iron oxide nanoparticles supported on MgO

Hiroki Ago, Kazuhiro Nakamura, Shingo Imamura, Masaharu Tsuji

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    Abstract

    We have studied the growth of carbon nanotubes by chemical vapor deposition (CVD) on the nanoparticles of iron oxide with two different diameters, 4 and 10 nm, supported on MgO powder. Both nanoparticles catalyzed the growth of double-wall carbon nanotubes (DWNTs) together with a small amount of single-wall carbon nanotubes (SWNTs). We found that the inner- and outer-diameters of the DWNTs were modified by the initial nanoparticle size; smaller nanoparticles catalyzed the growth of the DWNTs with smaller diameters. These results suggest that the MgO support strongly influence the catalytic activity of nanoparticles by reduction of the catalytically-active size.

    Original languageEnglish
    Pages (from-to)308-313
    Number of pages6
    JournalChemical Physics Letters
    Volume391
    Issue number4-6
    DOIs
    Publication statusPublished - Jun 21 2004

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    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)
    • Physical and Theoretical Chemistry

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